About People Gavin Ellis Gavin is one of the Founders of Hubbub. Previously Gavin was Senior Client Manager at Global Action Plan, one of the UK’s leading environmental charities. There he led major environmental behaviour change campaigns with clients such as Sainsbury’s, Telefonica and Unilever. Prior to that Gavin was Marketing Manager at Global Action Plan. He also set up the UK’s first online carbon calculator and the UK’s first environmental lifestyle magazine Ergo.